To crankcase (beam) 18 (pic. 79) the rear axle is attached to the gearbox, which houses the main gear and differential. The leading 32 and driven 41 gears of the final drive are paired in terms of contact and noise, therefore, if one of them is damaged, both are replaced. Between the inner races of the bearings 23 and 29 of the drive gear there is a spacer sleeve 30, which, deforming when the drive gear nut is tightened, provides a preload in the bearings.
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Pic. 79. Rear axle:
1 - brake shield; 2 - axle shaft; 3 - wheel disk; 4 - axle shaft flange; 5 - guide pin; 6 - oil deflector; 7 - locking sleeve of the bearing; 8 - axle bearing plate; 9 - wheel bolt; 10 - nut securing the half shaft bearing plate and the brake shield; 11 - brake shoe; 12 - brake drum bushing; 13 - brake drum; 14 - wheel rim; 15 - flange of the rear axle housing; 16 - half shaft bearing; 77 - stuffing box; 18 - rear axle housing; 19 - bolt for fastening the gearbox to the rear axle housing; 20 - main gear housing; 27 - bolt for fastening the driven gear to the flange of the differential box; 22 - differential box; 23 - rear bearing of the final drive gear; 24 - drive gear flange seal; 25 - dirt-reflecting ring; 26 - flange for fastening the cardan shaft to the drive gear of the gearbox; 27 - pinion nut; 28 - washer; 29 - front bearing of the main gear of the main gear of the rear axle; 30 - spacer sleeve; 31 - adjusting gasket; 32 - main gear drive gear; 33 - a bolt of fastening of a cover of the differential bearing; 34 - magnetic plug of the oil drain hole; 35 - rear cover of the rear axle housing; 36 - satellite; 37 - oil filler flange; 38 - oil filler plug; 39 - finger satellites; 40 - axle gear; 41 - driven gear of the main gear; 42 - support adjusting ring of the axle gear; 43 - differential bearing cap; 44 - a bolt of fastening of a stopper of an adjusting nut; 45 - adjusting nut stopper; 46 - differential box bearing; 47 - adjusting nut of the driven gear.
1 - brake shield; 2 - axle shaft; 3 - wheel disk; 4 - axle shaft flange; 5 - guide pin; 6 - oil deflector; 7 - locking sleeve of the bearing; 8 - axle bearing plate; 9 - wheel bolt; 10 - nut securing the half shaft bearing plate and the brake shield; 11 - brake shoe; 12 - brake drum bushing; 13 - brake drum; 14 - wheel rim; 15 - flange of the rear axle housing; 16 - half shaft bearing; 77 - stuffing box; 18 - rear axle housing; 19 - bolt for fastening the gearbox to the rear axle housing; 20 - main gear housing; 27 - bolt for fastening the driven gear to the flange of the differential box; 22 - differential box; 23 - rear bearing of the final drive gear; 24 - drive gear flange seal; 25 - dirt-reflecting ring; 26 - flange for fastening the cardan shaft to the drive gear of the gearbox; 27 - pinion nut; 28 - washer; 29 - front bearing of the main gear of the main gear of the rear axle; 30 - spacer sleeve; 31 - adjusting gasket; 32 - main gear drive gear; 33 - a bolt of fastening of a cover of the differential bearing; 34 - magnetic plug of the oil drain hole; 35 - rear cover of the rear axle housing; 36 - satellite; 37 - oil filler flange; 38 - oil filler plug; 39 - finger satellites; 40 - axle gear; 41 - driven gear of the main gear; 42 - support adjusting ring of the axle gear; 43 - differential bearing cap; 44 - a bolt of fastening of a stopper of an adjusting nut; 45 - adjusting nut stopper; 46 - differential box bearing; 47 - adjusting nut of the driven gear.
An adjusting ring 31 is installed between the end face of the drive gear and the inner bearing, which determines the correct position of the drive gear relative to the driven gear.
The driven gear of the main gear is attached to the flange of the differential box 22, which rotates on two bearings 46. The preload in these bearings, as well as the gap between the teeth of the drive and driven gears, is regulated by nuts 47, wrapped in split bearing beds. Side gears 40 are installed in the cylindrical sockets of the differential box and rest on the box through the support washers 42. By selecting washers in thickness, a lateral clearance of 0.0-0.1 mm is established between the teeth of the satellites and side gears.
The axle shaft 2 with its inner end enters the splined hole of the side gear, and the outer end rests on the ball bearing 16, which is fixed on the axle shaft with a locking ring 7. The axle shaft bearing is sealed in the bridge beam socket from the inside by a self-compressing gland 17, and from the outside by a rubber ring. The bearing is fixed in the seat of the beam by a plate 8, which, together with the oil deflector 6 and the brake shield 1, is fastened with four bolts to the flange 15 of the beam.
The dimensions of the main mating parts and the limits of permissible wear during operation are given in Table. 12.